Angular:
2.4.5
Firebase:
3.6.7
AngularFire:
beta.7
Other (e.g. Ionic/Cordova, Node, browser, operating system):
N/A
Failing test unit, Plunkr, or JSFiddle demonstrating the problem
N/A
Steps to set up and reproduce
N/A
Sample data and security rules
N/A
* Errors in the JavaScript console *
N/A
* Output from firebase.database().enableLogging(true); *
N/A
* Screenshots *

AngularFireAuth is used as FirebaseAuth was removed in beta.7.
FirebaseAuth is used and users who follow these examples will have exceptions in their code and their apps will not work.
As mentioned in https://github.com/angular/angularfire2/pull/755#issuecomment-275474730, this should probably show up as a breaking change in the beta.7 changelog. There are a couple other places where FirebaseAuth is still used as well: https://github.com/angular/angularfire2/search?utf8=%E2%9C%93&q=FirebaseAuth
The API reference is out of date and needs to a new generation process. The breaking change was not reflected in the changelog due to an error in the changelog generation. I'll update it and make a note in the docs as well.
Thank you @davideast!
Most helpful comment
The API reference is out of date and needs to a new generation process. The breaking change was not reflected in the changelog due to an error in the changelog generation. I'll update it and make a note in the docs as well.